Lord of Vermilion: Guren no Ou Temporada 1 Episódio 3

Seeing Kotetsu about to be killed, Chihiro reawakens his Heroic Blood. He remembers Eikos real name is Cerdid, allowing her to leave her human form for he true one. She is a Defender assigned to Chihiro. Jun remarks to Yuri her beloved is a problem. Chihiro kills the monster, but angrily tells Cerdid it used to be a fellow university student; she counters by saying once a human becomes a familiar theres no going back. Kakihara and Tsubasa snap pictures of the fight, claiming this is a huge scoop. Kakihara calls Chihiro a monster and now understands how he killed 13 years ago.